"Ice Melts" Changes in Temperature and Water PPT Courseware 2

Description

"Ice Melts" Changes in Temperature and Water PPT Courseware 2

Research purposes

The volume of ice affects melting.

The concentration of ice affects its melting rate.

The melting speed characteristics of ice cubes with different solutes.

Effect of solute particle size on ice melting.

Experimental process (1)

Take ice formed by four different volumes of water, 10cc, 50cc, 100cc, and 150cc, put it into a beaker, record and observe the melting situation.

Results: 1. 10 cc of water solidifies fastest, followed by 50 cc, 100 cc, and 150 cc.

2. 10 cc of water melts fastest, followed by 50 cc, 100 cc, and 150 cc.

Experimental process (2)

Take the ice formed from 100cc of water containing 5 grams, 10 grams, and 20 grams of salt as the solute in the experiment in the previous lesson. Take out the ice and place it at room temperature, and observe the melting time and melting situation of the ice.

Results: Ice with 5 grams of salt melts fastest, followed by ice cubes with 10 grams and 20 grams.

Experimental process (3)

Take the ice cubes made from 20 grams of salt, 20 grams of sugar, 20 grams of monosodium glutamate, and 20 grams of pepper from the previous lesson. Take out the ice and place it at room temperature. Observe how long and how long the ice melts. .

Results: Ice cubes with MSG melt the fastest, followed by ice cubes with pepper, salt, and sugar.

Experimental results

Take the ice out of the refrigerator. The smaller the ice, the faster it melts.

Take ice of different concentrations out of the refrigerator. The lower the concentration, the faster the ice melts.

Ice with different melts melts at different speeds. Ice with MSG melts faster than ice with pepper, salt, or sugar.

Take the ice mixed with sweet potato particles of different sizes out of the refrigerator. The smaller the particles, the faster the ice melts; the larger the particles, the slower the ice melts.

Summary of this lesson

The size of the volume affects the melting of ice. The smaller the volume, the faster it melts.

Concentration affects the melting of water. The lower the concentration, the faster it melts.

Different solutes cause ice cubes to melt at different rates.

The size of the particles in the ice cube will affect its melting. The larger the particles you put in, the slower it will melt.

Expand knowledge

In the early stages of the sea surface, thin ice formed due to the low temperature. Then, as time went on and the low temperature continued, the ice layer slowly thickened, because the thicker the ice layer, the higher the concentration of salt in the sea, and the higher the salt content, the less Freezes easily.

after class homework:

Complete observation experiments on the melting phenomena of various ice cubes at home!

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Update Time: 2024-11-18

This template belongs to science courseware Third Grade Science Volume 2, Textbook Edition industry PPT template

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